The results were as follows: compared with control treatment
(CK), when the amount of biochar was 40 t·ha−1
, rapeseed and sweet potato yields were increased by 36.02%
and 53.77% respectively; the soil water stable aggregate (N0.25 mm) in the 0–15 cm soil layer had a remarkable
increase than other treatments, especially the macroaggregate with particle size larger than N2 mm